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Friday, 21 May 2010

AUTOMATIC ROOM LIGHT CONTROL WITH BI DIRECTIONAL VISITOR COUNTER

AUTOMATIC ROOM LIGHT CONTROL WITH BI DIRECTIONAL VISITOR COUNTER

Project title is “AUTOMATIC ROOM LIGHT CONTROLLER WITH BIDIRECTIONAL VISITOR COUNTER “. mICROCONTROLLER BASED PROJECT

The objective of this project is to make a controller based model to count number of persons visiting particular room and accordingly light up the room. Here we can use sensor and can know present number of persons.

In today’s world, there is a continuous need for automatic appliances with the increase in standard of living, there is a sense of urgency for developing circuits that would ease the complexity of life.

Also if at all one wants to know the number of people present in room so as not to have congestion. This circuit proves to be helpful.


CIRCUIT DIAGRAM

Automatic room light Control with bi directional visitor counter  circuit

Automatic room light Control with bi directional visitor counter circuit

RECEIVER CIRCUIT


The IR transmitter will emit modulated 38 kHz IR signal and at the receiver we use TSOP1738 (Infrared Sensor). The output goes high when the there is an interruption and it return back to low after the time period determined by the capacitor and resistor in the circuit. I.e. around 1 second. CL100 is to trigger the IC555 which is configured as monostable multivibrator. Input is given to the Port 1 of the microcontroller. Port 0 is used for the 7-Segment display purpose. Port 2 is used for the Relay Turn On and Turn off Purpose.LTS 542 (Common Anode) is used for 7-Segment display. And that time Relay will get Voltage and triggered so light will get voltage and it will turn on. And when counter will be 00 that time Relay will be turned off. Reset button will reset the microcontroller.Microcontroller based Visitor Counter.

TRANSMISSION CIRCUIT


This circuit diagram shows how a 555 timer IC is configured to function as a basic monostable multivibrator. A monostable multivibrator is a timing circuit that changes state once triggered, but returns to its original state after a certain time delay. It got its name from the fact that only one of its output states is stable. It is also known as a ‘one-shot’.

In this circuit, a negative pulse applied at pin 2 triggers an internal flip-flop that turns off pin 7′s discharge transistor, allowing C1 to charge up through

R1. At the same time, the flip-flop brings the output (pin 3) level to ‘high’. When capacitor C1 as charged up to about 2/3 Vcc, the flip-flop is triggered once again, this time making the pin 3 output ‘low’ and turning on pin 7′s discharge transistor, which discharges C1 to ground. This circuit, in effect, produces a pulse at pin 3 whose width t is just the product of R1 and C1, i.e., t=R1C1.

IR Transmission circuit is used to generate the modulated 36 kHz IR signal. The IC555 in the transmitter side is to generate 36 kHz square wave. Adjust the preset in the transmitter to get a 38 kHz signal at the o/p. around 1.4K we get a 38 kHz signal. Then you point it over the sensor and its o/p will go low when it senses the IR signal of 38 kHz.

PCB LAYOUT

30 comments:

  1. can u send me the tested circuit of automatic room light controller and smart traffic light on my id foxthink.fear@gmail.com
    as early as possible

    ReplyDelete
  2. hai.. can you send the pcb layout and the coding to me please..
    please also send schematic diagram please..

    syukorm_88@yahoo.com

    ReplyDelete
  3. hi ,
    please can u send me the circuit diagram, and further details related to this topic.

    anurag.kashyap20@rediffmail.com

    ReplyDelete
  4. hi
    can u plz send me any more info related to this topic........
    at phadke.ketaki11@gmail.com

    ReplyDelete
  5. plz send specified ckt dig,block dig to sadanandpatil001@gmail.com

    ReplyDelete
  6. can u send me a full project report of this on archanaswami7@gmail.com

    ReplyDelete
  7. hi
    can u send me all info about it please
    to q12526@live.com

    ReplyDelete
  8. pls send me the project report and component list of this project on shimalayee@yahoo.com

    ReplyDelete
  9. This blog has definitely changed my perspective on this subject. Theres no way I wouldve

    thought about it this way if I hadnt come across your blog. All I was doing was cruising

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  10. This comment has been removed by the author.

    ReplyDelete
  11. plzzz send the more information of it on tht email idishikapaliwal@gmail.com

    ReplyDelete
  12. plz tell me why we use two 7-segment display to counter the nomber of persons

    ReplyDelete
  13. can u send the coding c programming for microcontroller to me please..just need it for my final year project..

    fawwaz_1225@yahoo.com

    ReplyDelete
  14. how to handle this system for two door room plz suggest me

    ReplyDelete
  15. hey can you send me the further detail of this project?

    ReplyDelete
  16. pls send me assembly language program of this project

    ReplyDelete
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